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Synthesis of Functionalized 12-, 13-and 14-Membered Crown EthersBearing Exocyclic Polymerizable Groups and the Binding Properties and Conductivities of Their Lithium Doped Polymers. -As shown for the 14-membered crown ether (III), derivatives bearing three different types of an exocyclic polymerizable methacrylate are prepared for three different crown ether ring sizes. The polymers of each methacrylate monomer are obtained by standard free radical polymerization. The relative binding ability toward Li+ is studied by 13C NMR analysis. The ionic conductivities of the lithium-doped materials is measured over the temp. range from 0 to 180 • C. The results show that polymers with the (CH2)6 or dioxyethylene spacer groups between the ring and the backbone possess higher conductivities. In addition, a comparison between 12-and 14-membered analogues shows higher conductivity values for the smaller ring polymers.-(COLLIE, L.; DENNESS, J. E.; PARKER, D.; O'CARROLL, F.; TACHON, C.; J. Chem. Soc., Perkin Trans.